The Queen shelter, designed for those limited space areas where protection is a must. It has an inside dimension of 4’ x 10’ x 9’high. The “Queen” shelter offers rugged durability and 36 sq. ft. of useable floor space for those hard to cover spaces. A 30” x 69” walk-in door, lift lugs, inner tie-downs, anchor holes in the base flange and R-10 urethane insulation all come as standard features. Walls are slightly tapered from bottom to top to allow nesting one inside the other for transporting. Options include louvered vents, plexi-glass windows, gas detector inspection doors, panic hardware, hinged roof hatch, roof turbines, and custom coloring. Explosion proof CATA-Dyne heaters may also be included with your purchase. As with all products manufactured by D & G, only high quality virgin polyethylene is used.